Not what I mean—I'd rather not go code hunting for game variables and expected file structure if I can avoid it. Even the simplest procedures can be made inscrutable by poor documentation.

Anyway, needn't have worried. At first glance it looks like it's been commented responsibly, and I did end up finding user-submitted games and some instructions for arcade conversion buried in here: http://igames.origon.dk/forum/index.php